Sartorius Stedim Biotech Gmbh

Sartorius Biotech Gmbh

Dieter Armgart

Juergen Van Den Boogaard

Matthias Grabosch

Bernhard Diel

Dirk Leiser

Michael Rodenberg

Vanessa Rakebrandt

Jürgen Van Den Boogaard

A method for carrying out an integrity test on a filter element includes filling a fluid into at least one vessel (), in which a filter element (F) to be tested is arranged. The method proceeds by setting the pressure of the fluid in the vessel () to a predetermined test pressure, and maintaining the test pressure in the vessel () with controlled replenishment of fluid into the vessel () and/or a controlled change in internal volume of the vessel (). The method continues by determining an integrity characteristic variable for the filter element (F) in a manner dependent on the controlled replenishment of fluid into the vessel () and/or dependent on the controlled change in internal volume of the vessel () before attaining a substantially continuous volume flow of fluid for maintaining the specific test pressure in the vessel ().

Method and device for carrying out an integrity test on a filter element

The invention relates to a crossflow-filtration method for beverages, in particular beer, which comprises the following steps: a) the feed liquid is introduced into a filter module by means of a tangential flow through a filter membrane () in a first direction, whereby the filtrate flow on the filtrate side () of the filter module is maintained within predetermined threshold values; b) the entry pressure is reduced and the filter is backflushed by surges of filtrate initiated by a reversal of the flow direction transversally to the membrane; c) the feed liquid is optionally introduced in an inverse flow direction to that of step a) and the concentrate is evacuated on the non-filtrate () side of the module; d) the entry pressure is reduced and the filter is backflushed by surges of filtrate initiated by a reversal of the flow direction transversally to the membrane; e) steps a) to d) are repeated until the filtrate flow lies below the lower predetermined threshold value; f) to k) the filter is emptied by applying pressure, backflushed, rinsed and l) steps a) to k) are resumed.

Crossflow-filtration method for beverages

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Moringen, Germany

Dieter Armgart